This is the Original Unedited Version made in 1937, 51 mins 37 secs, (not the later 1943 NARA version which was edited down to 46 mins 04 secs).
Data courtesy of www.imdb.com This tells of the struggles during the Spanish Civil War. It deals with the war at different levels: from the political level, at the ground military level focusing on battles in Madrid and the road from Madrid to Valencia, and at the support level. With the latter, a key project was building an irrigation system for an agricultural field near Fuentedueña so that food could be grown to feed the soldiers. Full info http://www.imdb.com/title/tt0029594/?ref_=fn_al_tt_1
Narrated by Ernest Hemingway. Directed by Joris Ivens.